Hey mate,
I have an MDX and can check if I am experiencing the same thing. I am also experiencing strange behavior in menus, but haven’t noticed anything audible yet.
Can you post this over in the bug reporting area?
You can crosspost this thread with the bug report.
Sorry you havent had any responses, most of the MOD team take their well earned weekends. I have no doubt that you will have someone from the team checking in with you tomorrow.